Fan voiced their anger at seeing second-hand tickets sold for over £1,000 on Viagogo soon after, and now the charity has hit out at the resales.

It said on its website : "There is a wider issue around the secondary ticketing market and we firmly believe the only people who should profit from Teenage Cancer Trust at the Royal Albert Hall are young people with cancer."

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And ticket reform campaigners FanFair Alliance had also said: "Teenage Cancer Trust have gone to huge lengths and expense to prevent resale and profiteering of their tickets.

"To all intents and purposes they are non-transferable, with buyers needing to provide photo ID on the door.

"And yet, not only are Viagogo encouraging touts to sell these tickets at vastly inflated prices, none of which goes back to the charity, they attempt to circumvent the terms and conditions by advertising that the buyer will be accompanied into the venue by the seller.

"Leaving aside the moral repugnance of profiteering at the expense of teenage cancer sufferers, this appears a flagrant breach of consumer law and yet another reason why Government intervention is so desperately needed."